Canon EF70-300mm f/4-5.6 IS II USM Instructions Manual page 11

4. Fixing the Zoom Ring
The zoom ring can be fixed to keep the lens at the shortest point. This function is convenient for
carrying a camera on a strap because it prevents the lens from extending.
1
Rotate the zoom ring to the
widest position (70 mm).
The zoom ring cannot be fixed in place at any position other than the
widest position.
2
Slide the zoom ring lock
lever in the direction
indicated by the arrow.
To release the zoom ring, slide
● ●
the zoom ring lock lever in the
direction opposite to the arrow.
ENG-10